To improve the review and effectiveness of the cost of living adjustments to pay and benefits for members of the Armed Forces and civilian employees of the Department of Defense whose permanent duty station is located in the 19th Congressional District of California, and for other purposes.

HR 3120 requires the Defense Department to study how cost of living adjustments (COLA) are calculated for military personnel and Department of Defense civilian employees stationed in California's 19th Congressional District (including Monterey and Santa Clara). The bill mandates a report within one year assessing whether current COLA methods accurately reflect high local costs like housing, groceries, and healthcare in the district. The report must evaluate factors such as military commissary benefits and whether certain areas should be classified as high-cost locations for pay adjustments. This is a procedural review, not a policy change, focusing solely on examining the COLA calculation process for this specific district.